Design method and system of lifting moving device

Abstract

The invention belongs to the technical field of computer aided design, and provides a design method and system of a lifting moving device. Finite element stress analysis is carried out on the lifting moving device; calculating a weak stress area in each stress sub-area; marking a weak stress area on the three-dimensional model of the lifting moving device as a to-be-reinforced area, and obtaining an optimized design three-dimensional model of the lifting moving device marked with the to-be-reinforced area; according to the method, the weak stress area containing the stress point capable of balancing the stress point in the horizontal direction on the lifting moving device is intelligently marked, the weak stress area can be reinforced in subsequent manufacturing, so that the stress of the lifting moving device in the horizontal direction can be balanced, and deformation of the lifting moving device in operation is avoided; and therefore, the hoisted building truss structure can be accurately located.

Description

Technical Field

[0001] The present invention belongs to the technical field of computer-aided design, and in particular relates to a design method and system for a lifting and moving device. Background Art

[0002] In large-scale engineering construction site scenes, there are many large-span, large-tonnage prefabricated building truss structures, such as large venues, exhibition centers, etc. These structures are first assembled on the ground to form an integral building truss structure, so that the convenient conditions on the ground can be fully utilized for welding, painting and other operations, greatly reducing the amount of high-altitude operations and reducing construction risks. Then, through hydraulic lifting equipment, using rigging such as steel strands, the entire truss is smoothly lifted to the designed position. During the lifting process, it is necessary to accurately control the lifting speed and synchronization to ensure that the building truss structure is evenly stressed and avoid deformation; however, the overall lifting of the existing technology is generally located in-situ lifting or one-way sliding, and the lifting and moving device is lifted from the ground to the installation elevation, and then placed. Due to the in-situ lifting or one-way sliding, there is a deviation in the placement, and accurate placement cannot be achieved. This technology can lift the component to the specified elevation through the translation track and then translate it in two directions to achieve precise placement.

[0003] In the design of the three-dimensional model of the lifting and moving device, it is often necessary to dynamically consider the impact of the specific lifting object on the lifting and moving device to avoid deformation, stress imbalance and other effects on the truss structure of the lifting object during the lifting process. Summary of the invention

[0004] The purpose of the present invention is to propose a design method and system for a lifting and moving device to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] In order to achieve the above object, the present invention proposes a design method of a lifting and moving device, which specifically includes the following steps:

[0006] S100, importing the three-dimensional model of the lifting and moving device into the finite element software to divide the mesh to obtain a finite element mesh model;

[0007] S200, performing finite element force analysis on the finite element mesh model to obtain a force cloud diagram;

[0008] S300, using the watershed algorithm to extract the watershed line of the force cloud map;

[0009] S400, dividing the force cloud map into a plurality of force sub-regions formed by each watershed line;

[0010] S500, calculating the weak stress area in each stress sub-area;

[0011] S600, marking the weak stress area on the three-dimensional model of the lifting and moving device as the area to be strengthened, and obtaining the optimized design three-dimensional model of the lifting and moving device with the area to be strengthened marked.

[0012] Furthermore, the finite element software is ANSYS software.

[0013] The three-dimensional model is a three-dimensional model obtained by scanning the lifting and moving device with a 3D scanner.

[0014] Preferably, the 3D model is modeled by SolidWorks, CREO 3D model

[0015] Furthermore, the grid division method is to divide the three-dimensional model using free grid division.

[0016] Further, in S400, the method for dividing the force cloud map into multiple stressed sub-regions formed by various watershed lines is: the average stress value of the points on all watershed lines on the force cloud map is MYL; the area where the average stress value of all points in the area formed by each watershed line is greater than MYL is marked as a stressed sub-region; or, the minimum value of the points on each watershed line is the minimum value of the boundary force; each area formed by each watershed line whose minimum value of the boundary force is greater than MYL is recorded as a stressed sub-region.

[0017] Since the load-bearing structure of the lifting and moving device is supported by multiple steel structures connected to each other, the pressure is transmitted to the lower steel structure, and the lower steel structure is transmitted to the bottom structure; during the operation of the lifting and moving device, the load-bearing structure of the lifting and moving device is subjected to bending and deformation due to the heavy objects. In the application scenario where the large-scale building truss structure needs to be precisely positioned, the load-bearing structure of the lifting and moving device is a bending member when it is subjected to the large load of the building truss structure. Since the load direction of the building truss structure is directly opposite to the bending member, the bending member is prone to bending and deformation at this time, so that the building truss structure cannot be precisely positioned. The existing method generally thickens the bending member or stacks multiple bending members; the longitudinal movement frame and the transverse movement frame on the lifting and moving device of the present application convert the bending member into an axial load-bearing member to connect the load point with the support point to avoid deformation. In the axial load-bearing member, the load of the building truss structure will be decomposed into the force in the connecting rod direction and the horizontal direction;

[0018] If the force-bearing sub-regions are not adjacent, that is, the force-bearing sub-regions are independently distributed, then a simple finite element analysis can intuitively determine the area with greater force in the horizontal direction when subjected to a larger load. However, if multiple force-bearing sub-regions are adjacent to each other, or even continuous small-scale range-bound force-bearing sub-regions appear, the load in one area will be equal to or even greater than that of a single force-bearing sub-region. It is impossible to accurately determine the area with greater force in the horizontal direction when subjected to a larger load (because there are many and discrete force points, it is impossible to accurately locate the area with a high probability of deformation due to load bearing). The present application marks the weak force area on the lifting and moving device that contains the force points that can balance the horizontal direction, so that strengthening the weak force area in subsequent manufacturing can enable the lifting and moving device to balance the horizontal force, avoid deformation of the lifting and moving device during operation, and enable the hoisted building truss structure to be accurately positioned. The specific method is:

[0019] Furthermore, in S500, the method for calculating the weak stress area in each stress sub-area is:

[0020] The point with the largest stress value in each force-bearing sub-region is recorded as the force-bearing point; the average stress value of each point in the force-bearing sub-region is recorded as the regional force value; the force-bearing sub-region with the largest regional force value in each force-bearing sub-region is recorded as the supporting point region; the force-bearing point in the supporting point region is recorded as the supporting point; the distance between the supporting point and the force-bearing point of each force-bearing sub-region is recorded as the component arm distance of each force-bearing sub-region;

[0021] Sequentially perform mutual influence screening on each force-bearing sub-region except the support point region to obtain the mutual influence region;

[0022] The weak stress areas in each stress sub-area are marked according to the mutual influence area.

[0023] Furthermore, the method for performing mutual influence screening to obtain the mutual influence area is:

[0024] The force sub-region to be screened for mutual influence is the current force sub-region, and the force sub-region whose regional force value is less than the regional force value of the current force sub-region except the support point region, and whose force arm distance has the smallest non-zero difference with the force arm distance of the current force sub-region is the current minimum force region; the force sub-region whose regional force value is less than the regional force value of the current force sub-region except the support point region, and whose force arm distance has the largest non-zero difference with the force arm distance of the current force sub-region is the current maximum force region; (when selecting the current minimum force region and the current maximum force region, the minimum force region must not only meet the requirement of a lower force value, but also be relatively close to the current force sub-region in terms of force arm distance; although the maximum force region also meets the requirement of a lower force value, there is a large difference in force arm distance; in this way, the two regions with the greatest and smallest influence on the current force sub-region through force conduction can be accurately located);

[0025] The plane determined by the force points of the current minimum force area, the force points of the current maximum force area and the support points is the current force surface; the intersection line of the current force surface and the cutting plane of the three-dimensional force cloud map is the current intersection line; all force sub-areas containing the current intersection line are recorded as the mutual influence area of ​​the current force sub-areas.

[0026] Among them, since the mutual influence area is the area where the load of the two-dimensional cross-section of the force cloud map cut by the cutting plane located by the above three force points is located, each mutual influence area is the load decomposition position of the interaction force between each point inside the force cloud map for the current force sub-area (because the force of the current force sub-area is not a simple sum of the forces of each point on its force surface, but refers to the interaction force between each point inside the force cloud map, and these forces have an effect and maintain balance inside the entire force cloud map); by estimating the mutual influence area, it is possible to accurately locate in subsequent steps the weak force areas where the probability of deformation due to load is high and cannot be accurately located due to the large number of discrete force points.

[0027] Furthermore, the method for marking the weak stress area in each stress sub-area according to the mutual influence area is as follows:

[0028] Determine whether the mutual influence area of ​​each stressed sub-area is nonlinearly stressed. If so, mark the current stressed sub-area as a weak stressed area.

[0029] Among them, most of the deformation of the lifting and moving device during operation is caused by the load of multiple discrete adjacent force sub-areas or continuous small-scale range force sub-areas with a large number of force points, and the weak force area is the force sub-area affected by the interaction force between these multiple adjacent mutual influence areas or continuous small-scale range mutual influence areas. Optimizing and strengthening the weak force area can greatly reduce the probability of deformation caused by large loads, so that the hoisted building truss structure can be accurately positioned.

[0030] Furthermore, the method for judging whether the mutually-influenced region of each stressed sub-region is nonlinearly stressed is as follows:

[0031] According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence from small to large and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list;

[0032] The mutual influence region with the smallest absolute value of the difference between the regional force value of the current maximum force region and the regional force value of the current maximum force region in the influence list is recorded as the increasing force region of the i-th mutual influence region; the mutual influence region with the smallest absolute value of the difference between the regional force value of the current minimum force region and the regional force value of the current minimum force region in the influence list is recorded as the decreasing force region of the i-th mutual influence region; the absolute value of the difference between the regional force value of the increasing force region of the i-th mutual influence region and the regional force value of the decreasing force region of the i-th mutual influence region is taken as Diff(i);

[0033] If when traversing i from 1 to N, there is a situation where Diff(i-1) is greater than Diff(i) and Diff(i) is less than Diff(i+1), then the mutual influence area of ​​the current force-bearing sub-area is nonlinear force, otherwise it is linear force.

[0034] Among them, by judging that the mutual influence area of ​​the current force-bearing sub-area is nonlinear force, it can be accurately identified whether the interaction forces between the various mutual influence areas of the current force-bearing sub-area have a common effect on the current force-bearing sub-area. If it is nonlinear force, it means that there is an unbalanced large load influence between the various mutual influence areas, which has a greater impact on the current force-bearing sub-area. The mutual influence areas that are the source of these unbalanced large loads have a greater probability of causing the current force-bearing sub-area position to deform. Therefore, it is necessary to mark these force-bearing sub-areas that are subjected to nonlinear force loads (the linear force of the mutual influence area of ​​the current force-bearing sub-area indicates that a balanced load is applied between the various mutual influence areas to affect the force-bearing sub-area, and the force-bearing sub-area The force load in the region is decomposed and offset between each mutually influencing region, and it is not easy to produce deformation). That is, since the force-increasing region and the force-reducing region are the decomposed forces in the two force decomposition directions of the current force region, their difference can reflect whether it is a linear balance of force. Therefore, as long as the difference between the force-increasing region and the force-reducing region is locally minimal, it does not have continuous linear force. However, since the source of the unbalanced large load is often not necessarily a continuous adjacent region or a single region, sometimes it is caused by several force points. The above method cannot accurately identify it. Therefore, it is necessary to further improve the judgment of whether it is nonlinear force through the following directions, specifically:

[0035] Preferably, the method for determining whether the mutually-influenced region of each stressed sub-region is nonlinearly stressed is replaced by:

[0036] According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence from small to large and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list;

[0037] The sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force values ​​of the current maximum force region is recorded as the incremental sum; the sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force values ​​of the current minimum force region is recorded as the decremental sum;

[0038] When the sum of the increments is greater than the sum of the decrements, the absolute value of the difference between the maximum value of the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current maximum force region is taken as the cumulative force difference DiV(i); otherwise, the absolute value of the difference between the minimum value of the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current minimum force region is taken as the cumulative force difference DiV(i);

[0039] If when traversing i from 1 to N, there is a situation where DiV(i-1) is greater than DiV(i) and DiV(i) is less than DiV(i+1), then the mutual influence area of ​​the current force-bearing sub-area is nonlinear force, otherwise it is linear force.

[0040] Among them, the sum of increments and the sum of decrements are respectively the incremental accumulation and decrement accumulation of the decomposed forces of the current force area in the two force decomposition directions of each mutually influential area in turn. Therefore, the difference between them can reflect the linear balance of the loads of all mutually influential areas on the current force area. The cumulative force difference obtained by selecting the direction with the larger accumulated force can show the influence of the resultant forces of the force points of multiple mutually influential areas on the current force area at the same time, so as to avoid the influence of the resultant forces of non-adjacent continuous mutually influential areas on the force of the current force area at the same time, which affects the recognition accuracy of nonlinear force.

[0041] Preferably, reinforcing ribs are welded at corresponding positions of each area to be reinforced on the lifting and moving device according to the optimized designed three-dimensional model of the lifting and moving device.

[0042] Preferably, laser shock strengthening is performed on corresponding positions of each area to be strengthened on the lifting and moving device according to the optimized designed three-dimensional model of the lifting and moving device.

[0043] The lifting and moving device includes a lifting bracket, a longitudinal frame, a transverse frame, a lifting assembly, and a sling. The longitudinal frame and the transverse frame are Q355E square tubes, each including a main frame of 3 280×280×12mm square tubes, and the other parts are 80*10 seamless tubes. The model is 9700mm long, and the center distance between the longitudinal frame and the transverse frame is 3514mm.

[0044] Among them, the loads and constraints in the finite element force analysis are: a load of 220,000N is applied to the force position of the finite element mesh model of the lifting and moving device during the lifting operation (in order to consider the gap between the actual structure and the ideal structure in the steel structure design of the lifting and moving device and ensure the structural safety of the lifting and moving device. Increasing the design load on the basis of the actual load can avoid potential risks. The weight of the lifting and moving device is about 8,000kg, and the maximum lifting weight of the lifting and moving device during operation is about 10,000kg. According to the self-weight magnification factor of 1.3 times, the maximum load value of 220,000N is taken).

[0045] Among them, the stress value (unit: MPa) of each point on the force cloud diagram of the finite element mesh model is measured.

[0046] A lifting and moving device is designed according to an optimized design three-dimensional model of the lifting and moving device marked with an area to be strengthened obtained according to a design method of a lifting and moving device. The lifting and moving device includes a lifting bracket, a longitudinal frame, a transverse frame, a lifting assembly, and a sling.

[0047] The lifting bracket includes a plurality of lifting bracket lattice columns and a column top frame, wherein the plurality of lifting bracket lattice columns are stacked vertically, and the column top frame is arranged on the upper part of the uppermost lifting bracket lattice column. The lifting bracket lattice column can include multiple specifications, and each specification has the same length and width dimensions but different heights. The lifting bracket can be adjusted by setting different lifting bracket lattice columns.

[0048] The longitudinal moving frame is arranged on the top of two lifting brackets, the transverse moving frame is arranged on the longitudinal moving frame, and the lifting assembly is arranged on the transverse moving frame.

[0049] The lateral movement frame and the longitudinal movement frame are steel frame structures, the lower part is provided with sliding wheels and locking devices, and the longitudinal movement frame and the column top frame are provided with sliding tracks at corresponding positions. In addition, the lateral movement frame and the longitudinal movement frame 2 are also provided with sliding wheel driving motors.

[0050] The specific structures of the lifting assembly, the sliding wheels of the transverse frame and its driving motor and the locking device are common knowledge in the field.

[0051] The lifting assembly includes a lifting jack and a lifting steel strand, and the lower part of the lifting steel strand is connected to the spreader.

[0052] The sling comprises an upper crossbeam, an oblique steel strand, a lower crossbeam and a lifting lug. The upper crossbeam is connected to the lifting steel strand of the lifting assembly. Both sides of the upper crossbeam are connected to the lower crossbeam through the oblique steel strands, and a plurality of lifting lugs are symmetrically arranged on both sides of the lower part of the lower crossbeam, and the lifting lugs are used to connect to the roof truss.

[0053] Among them, the lifting and moving device sets a two-way translation track on the top of the lifting point, first lifts the lifted component to the specified elevation, then translates it in two directions through the sliding track, and then moves it to the specified position through translation. It is not affected by whether the support points of the lifted structure are constructed. The support points and supports of the lifted structure can be constructed first, and then it can be lifted to a certain height and translated to the support position, and precise positioning can be achieved through the two-way sliding track. However, the existing in-situ lifting technology cannot construct the support points of the lifted structure first or the one-way sliding cannot achieve precise positioning of the plane position. If the support points are constructed first, in-situ assembly and lifting cannot be achieved.

[0054] The present invention also provides a design system for a lifting and moving device, the design system for a lifting and moving device comprising: a processor, a memory, and a computer program stored in the memory and executable on the processor, the processor implementing the steps in the design method for a lifting and moving device when executing the computer program, the design system for a lifting and moving device can be run in computing devices such as desktop computers, notebook computers, PDAs, and cloud data centers, and the executable system may include, but is not limited to, a processor, a memory, and a server cluster, and the processor executing the computer program runs in the following system units:

[0055] A finite element modeling unit, used for importing a three-dimensional model of the lifting and moving device into the finite element software to divide the mesh and obtain a finite element mesh model;

[0056] A force element analysis unit is used to perform finite element force analysis on a finite element mesh model to obtain a force cloud diagram;

[0057] A watershed extraction unit, used to extract the watershed line of the force cloud map using a watershed algorithm;

[0058] A sub-region segmentation unit is used to segment a plurality of stress sub-regions formed by various watershed lines on the stress cloud map;

[0059] A weakness identification unit is used to calculate the weak stress area in each stress sub-area;

[0060] The unit for marking to be strengthened is used to mark the weak force area on the three-dimensional model of the lifting and moving device as the area to be strengthened, and obtain the optimized design three-dimensional model of the lifting and moving device marked with the area to be strengthened.

[0061] The beneficial effects of the present invention are as follows: the present invention provides a design method for a lifting and moving device, which intelligently marks the weak stress area on the lifting and moving device that includes the stress points that can balance the horizontal direction. By strengthening the weak stress area in subsequent manufacturing, the lifting and moving device can balance the horizontal force and avoid deformation of the lifting and moving device during operation, so that the hoisted building truss structure can be accurately positioned. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The above and other features of the present invention will become more obvious by describing in detail the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings of the present invention represent the same or similar elements. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0063] Figure 1 It is a flow chart of a design method of a lifting and moving device;

[0064] Figure 2 It is to perform finite element force analysis on the finite element mesh model to obtain the force cloud map;

[0065] Figure 3 It is a schematic diagram of the overall scheme of the lifting and moving device of the present invention;

[0066] Figure 4 It is a partial enlarged schematic diagram of the upper part of the lifting and moving device of the present invention;

[0067] Figure 5 It is a schematic diagram of a lifting device of the lifting and moving device of the present invention;

[0068] Figure 6 This is a schematic diagram of a use scenario of the lifting and moving device of the present invention;

[0069] Figure 7 It is a schematic diagram of the operation process of the lifting and moving device of the present invention;

[0070] Figure 8 The figure is a structural diagram of a design system for a lifting and moving device.

[0071] In the figure: 1. lifting bracket; 2. longitudinal frame; 3. transverse frame; 4. lifting assembly; 5. lifting device; 51. upper beam; 52. oblique steel strand; 53. lower beam; 54. lifting lug. DETAILED DESCRIPTION

[0072] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the present invention, so as to fully understand the purpose, scheme and effect of the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0073] Example 1

[0074] like Figure 1 The flowchart of the design method of a lifting and moving device according to the present invention is shown. Figure 1 To illustrate a design method of a lifting and moving device according to an embodiment of the present invention, a preferred embodiment is described in detail. It should be emphasized that the following description is only exemplary and is not intended to limit the scope and application of the present invention.

[0075] S100, importing the three-dimensional model of the lifting and moving device into the finite element software to divide the mesh to obtain a finite element mesh model;

[0076] S200, performing finite element force analysis on the finite element mesh model to obtain a force cloud diagram;

[0077] S300, using the watershed algorithm to extract the watershed line of the force cloud map;

[0078] S400, dividing the force cloud map into a plurality of force sub-regions formed by each watershed line;

[0079] S500, calculating the weak stress area in each stress sub-area;

[0080] S600, marking the weak stress area on the three-dimensional model of the lifting and moving device as the area to be strengthened, and obtaining the optimized design three-dimensional model of the lifting and moving device with the area to be strengthened marked.

[0081] Furthermore, the finite element software is ANSYS software.

[0082] Furthermore, if Figure 2 The force cloud map (the force cloud map of the lifting bracket part in the lifting and moving device) is obtained by performing finite element force analysis on the finite element mesh model, and the force cloud map is obtained by performing finite element force analysis on the finite element mesh model through ANSYS finite element software.

[0083] The three-dimensional model is a three-dimensional model obtained by scanning the lifting and moving device with a 3D scanner.

[0084] Preferably, the 3D model is modeled by SolidWorks, CREO 3D model

[0085] Furthermore, the grid division method is to divide the three-dimensional model using free grid division.

[0086] Furthermore, in S400, the method for dividing the force cloud map into multiple stressed sub-regions formed by various watershed lines is as follows: the average stress value of the points on all watershed lines on the force cloud map is MYL; the area where the average stress value of all points in the area formed by each watershed line is greater than MYL is marked as a stressed sub-region.

[0087] Furthermore, in S500, the method for calculating the weak stress area in each stress sub-area is:

[0088] The point with the largest stress value in each force-bearing sub-region is recorded as the force-bearing point; the average stress value of each point in the force-bearing sub-region is recorded as the regional force value; the force-bearing sub-region with the largest regional force value in each force-bearing sub-region is recorded as the supporting point region; the force-bearing point in the supporting point region is recorded as the supporting point; the distance between the supporting point and the force-bearing point of each force-bearing sub-region is recorded as the component arm distance of each force-bearing sub-region;

[0089] Sequentially perform mutual influence screening on each force-bearing sub-region except the support point region to obtain the mutual influence region;

[0090] The weak stress areas in each stress sub-area are marked according to the mutual influence area.

[0091] Furthermore, the method for performing mutual influence screening to obtain the mutual influence area is:

[0092] The force sub-region to be screened for mutual influence is taken as the current force sub-region, and the force sub-region whose regional force value is less than the regional force value of the current force sub-region except the support point region, and whose force arm distance has the smallest non-zero difference with the force arm distance of the current force sub-region is taken as the current minimum force region; the force sub-region whose regional force value is less than the regional force value of the current force sub-region except the support point region, and whose force arm distance has the largest non-zero difference with the force arm distance of the current force sub-region is taken as the current maximum force region;

[0093] The plane determined by the force points of the current minimum force area, the force points of the current maximum force area and the support points is the current force surface; the intersection line of the current force surface and the cutting plane of the three-dimensional force cloud map is the current intersection line; all force sub-areas containing the current intersection line are recorded as the mutual influence area of ​​the current force sub-areas.

[0094] Furthermore, the method for marking the weak stress area in each stress sub-area according to the mutual influence area is as follows:

[0095] Determine whether the mutual influence area of ​​each stressed sub-area is nonlinearly stressed. If so, mark the current stressed sub-area as a weak stressed area.

[0096] Furthermore, the method for judging whether the mutually-influenced region of each stressed sub-region is nonlinearly stressed is as follows:

[0097] According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence from small to large and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list;

[0098] The mutual influence region with the smallest absolute value of the difference between the regional force value of the current maximum force region and the regional force value of the current maximum force region in the influence list is recorded as the increasing force region of the i-th mutual influence region; the mutual influence region with the smallest absolute value of the difference between the regional force value of the current minimum force region and the regional force value of the current minimum force region in the influence list is recorded as the decreasing force region of the i-th mutual influence region; the absolute value of the difference between the regional force value of the increasing force region of the i-th mutual influence region and the regional force value of the decreasing force region of the i-th mutual influence region is taken as Diff(i);

[0099] If when traversing i from 1 to N, there is a situation where Diff(i-1) is greater than Diff(i) and Diff(i) is less than Diff(i+1), then the mutual influence area of ​​the current force-bearing sub-area is nonlinear force, otherwise it is linear force.

[0100] Preferably, reinforcing ribs are welded at corresponding positions of each area to be reinforced on the lifting and moving device according to the optimized designed three-dimensional model of the lifting and moving device.

[0101] The lifting and moving device includes a lifting bracket, a longitudinal frame, a transverse frame, a lifting assembly, and a sling. The longitudinal frame and the transverse frame are Q355E square tubes, each including a main frame of 3 280×280×12mm square tubes, and the other parts are 80*10 seamless tubes. The model is 9700mm long, and the center distance between the longitudinal frame and the transverse frame is 3514mm.

[0102] Among them, the loads and constraints in the finite element force analysis are: a load of 220,000N is applied to the force position of the finite element mesh model of the lifting and moving device during the lifting operation (in order to consider the gap between the actual structure and the ideal structure in the steel structure design of the lifting and moving device and ensure the structural safety of the lifting and moving device. Increasing the design load on the basis of the actual load can avoid potential risks. The weight of the lifting and moving device is about 8,000kg, and the maximum lifting weight of the lifting and moving device during operation is about 10,000kg. According to the self-weight magnification factor of 1.3 times, the maximum load value of 220,000N is taken).

[0103] Among them, the stress value (unit: MPa) of each point on the force cloud diagram of the finite element mesh model is measured.

[0104] Example 2

[0105] This embodiment 2 replaces the following contents on the basis of embodiment 1:

[0106] In S400, the method for dividing the force cloud map into multiple force sub-areas composed of various watershed lines is as follows: the average stress value of the points on all watershed lines on the force cloud map is MYL; the minimum value of the points on each watershed line is taken as the minimum boundary force value; and each area composed of each watershed line whose minimum boundary force value is greater than MYL is recorded as a force sub-area.

[0107] Preferably, the method for determining whether the mutually-influenced region of each stressed sub-region is nonlinearly stressed is replaced by:

[0108] According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence from small to large and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list;

[0109] The sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force values ​​of the current maximum force region is recorded as the incremental sum; the sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force values ​​of the current minimum force region is recorded as the decremental sum;

[0110] When the sum of the increments is greater than the sum of the decrements, the absolute value of the difference between the maximum value of the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current maximum force region is taken as the cumulative force difference DiV(i); otherwise, the absolute value of the difference between the minimum value of the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current minimum force region is taken as the cumulative force difference DiV(i);

[0111] If when traversing i from 1 to N, there is a situation where DiV(i-1) is greater than DiV(i) and DiV(i) is less than DiV(i+1), then the mutual influence area of ​​the current force-bearing sub-area is nonlinear force, otherwise it is linear force.

[0112] Preferably, laser shock strengthening is performed on corresponding positions of each area to be strengthened on the lifting and moving device according to the optimized designed three-dimensional model of the lifting and moving device.

[0113] An embodiment of the present invention provides a lifting and moving device, which is designed according to an optimized design three-dimensional model of a lifting and moving device with an area to be strengthened obtained by a design method of a lifting and moving device in Embodiment 1 or Embodiment 2, and by setting a bidirectional translation track on the top of the lifting point, the lifted component is first lifted to a specified elevation, and then translated in two directions by the sliding track, and then placed in a specified position by translation. It is not affected by whether the support points of the lifted structure are constructed, and the support points and supports of the lifted structure can be constructed first, and then translated to the support position after lifting to a certain height, and precise placement is achieved by the bidirectional sliding track. However, the existing in-situ lifting technology cannot construct the support points of the lifted structure first or the one-way sliding cannot achieve precise placement of the plane position. If the support points are constructed first, in-situ assembly and lifting cannot be achieved.

[0114] like Figure 3 , Figure 4 , Figure 5 As shown, Figure 3 It is a schematic diagram of the overall scheme of the lifting and moving device of the present invention; Figure 4It is a partial enlarged schematic diagram of the upper part of the lifting and moving device of the present invention; Figure 5 Schematic diagram of the lifting device of the lifting and moving device of the present invention; the lifting and moving device comprises a lifting bracket 1, a longitudinal moving frame 2, a transverse moving frame 3, a lifting component 4, and a lifting device 5;

[0115] The lifting bracket 1 includes a plurality of lifting bracket lattice columns and a column top frame, wherein the plurality of lifting bracket lattice columns are stacked vertically, and the column top frame is arranged on the upper part of the uppermost lifting bracket lattice column. The lifting bracket lattice column can include multiple specifications, and each specification has the same length and width dimensions but different heights. The lifting bracket 1 can be adjusted by setting different lifting bracket lattice columns.

[0116] The longitudinal moving frame 2 is arranged on the top of the two lifting brackets 1 , the transverse moving frame 3 is arranged on the longitudinal moving frame 2 , and the lifting assembly 4 is arranged on the transverse moving frame 3 .

[0117] The lateral frame 3 and the longitudinal frame 2 are steel frame structures, with sliding wheels and locking devices arranged at the bottom, and sliding tracks arranged at the corresponding positions of the longitudinal frame 2 and the column top frame. In addition, the lateral frame 3 and the longitudinal frame 2 are also provided with sliding wheel driving motors.

[0118] The specific structures of the lifting assembly 4, the sliding wheels of the transverse frame 3 and their driving motors, and the locking devices are common knowledge in the field.

[0119] The lifting assembly 4 includes a lifting jack and a lifting steel strand, and the lower part of the lifting steel strand is connected to the spreader 5.

[0120] The sling 5 includes an upper crossbeam 51, an oblique steel strand 52, a lower crossbeam 53, and a lifting lug 54. The upper crossbeam 51 is connected to the lifting steel strand of the lifting assembly 4. Both sides of the upper crossbeam 51 are connected to the lower crossbeam 53 through the oblique steel strand 52. A plurality of lifting lugs 54 are symmetrically arranged on both sides of the lower part of the lower crossbeam 53, 4 in the figure, and the lifting lugs 54 are used to connect to the roof truss.

[0121] It should be noted that the above-mentioned longitudinal and lateral movements are directions agreed upon by the applicant and are both movements in the horizontal direction and do not involve changes in height.

[0122] In the applicant's embodiment, in the Figure 6 In the usage scenario diagram shown in FIG. Figure 7The operation process diagram shown in the figure is as follows: After the installation of the overall roof truss and electrical, HVAC and other accessories, remove the assembly bracket to make the roof truss system reach the design status system, and install the support according to the design drawing. After completing the preparation, trial lifting, monitoring and other process links, start the lifting operation, and then install the lifting lug and lower beam of the sling system at the preset position of the roof truss. Then assemble the lifting and moving device, which specifically includes installing the lifting bracket lattice column, column top frame, longitudinal frame, and transverse frame. After the main body of the lifting and moving device is assembled on site, the upper beam and steel strand of the sling are installed, and the oblique steel strand is pre-tightened. Then install the side cable wind rope of the bracket, and the cable wind rope adopts φ19 steel wire rope. Lift the truss and accessories to 350~500mm above the design position and stop the operation. After the lifting stops, monitor the truss, compare the acquired data with the construction design value, and prepare for longitudinal movement when it meets the requirements. During the longitudinal movement construction, release the longitudinal locking device of the wheel, move the preset distance in the longitudinal direction, and lock the longitudinal locking device of the wheel again after it is in place. Then release the transverse locking device of the wheel. Move the truss along the preset distance horizontally, and lock the wheel lateral locking device again after it is in place. After the movement is completed, monitor the truss again, compare the acquired data with the construction design value, and prepare for dismounting when it meets the requirements.

[0123] An embodiment of the present invention provides a design system for a lifting and moving device, such as Figure 8 As shown, a design system for a lifting and moving device in this embodiment includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned design method for a lifting and moving device are implemented. The processor executes the computer program to run in the following system units:

[0124] A finite element modeling unit, used for importing a three-dimensional model of the lifting and moving device into the finite element software to divide the mesh and obtain a finite element mesh model;

[0125] A force element analysis unit is used to perform finite element force analysis on a finite element mesh model to obtain a force cloud diagram;

[0126] A watershed extraction unit, used to extract the watershed line of the force cloud map using a watershed algorithm;

[0127] A sub-region segmentation unit is used to segment a plurality of stress sub-regions formed by various watershed lines on the stress cloud map;

[0128] A weakness identification unit is used to calculate the weak stress area in each stress sub-area;

[0129] The unit for marking to be strengthened is used to mark the weak force area on the three-dimensional model of the lifting and moving device as the area to be strengthened, and obtain the optimized design three-dimensional model of the lifting and moving device marked with the area to be strengthened.

[0130] The design system of a lifting and moving device includes: a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in the above-mentioned embodiment of the design method of a lifting and moving device are implemented. The design system of a lifting and moving device can be run on computing devices such as desktop computers, laptop computers, PDAs, and cloud data centers. The executable system may include, but is not limited to, a processor, a memory, and a server cluster.

[0131] The design system of a lifting and moving device can be run in computing devices such as desktop computers, laptop computers, PDAs, and cloud data centers. The design system of a lifting and moving device includes, but is not limited to, a processor and a memory. Those skilled in the art can understand that the example is only an example of a design method and system for a lifting and moving device, and does not constitute a limitation on the design method and system for a lifting and moving device. It can include more or less components than the example, or combine certain components, or different components. For example, the design system of a lifting and moving device can also include input and output devices, network access devices, buses, etc.

[0132] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete component gate circuits or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of the design system of the lifting and moving device, and uses various interfaces and lines to connect the various sub-areas of the entire design system of the lifting and moving device.

[0133] The memory can be used to store the computer program and / or module, and the processor realizes the various functions of the design method and system of the lifting and moving device by running or executing the computer program and / or module stored in the memory, and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area can store data created according to the use of the mobile phone (such as audio data, a phone book, etc.), etc. In addition, the memory can include a high-speed random access memory, and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (SecureDigital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0134] Although the description of the present invention has been quite detailed and has been described in particular with respect to several described embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, so as to effectively cover the intended scope of the present invention. In addition, the present invention is described above with the embodiments foreseeable by the inventors, and its purpose is to provide a useful description, and those non-substantial changes to the present invention that are not currently foreseen may still represent equivalent changes of the present invention.

Claims

1. A design method for a lifting and moving device, characterized in that: The method comprises the following steps: S100, importing the three-dimensional model of the lifting and moving device into the finite element software to divide the mesh to obtain a finite element mesh model; S200, performing finite element force analysis on the finite element mesh model to obtain a force cloud diagram; S300, using the watershed algorithm to extract the watershed line of the force cloud map; S400, dividing the force cloud map into a plurality of force sub-regions formed by each watershed line; S500, calculating the weak stress area in each stress sub-area; S600, marking the weak stress area on the three-dimensional model of the lifting and moving device as the area to be strengthened, and obtaining the optimized design three-dimensional model of the lifting and moving device with the area to be strengthened marked.

2. The design method of a lifting and moving device according to claim 1, characterized in that: In S400, the method for dividing the force cloud map into multiple stressed sub-areas formed by various watershed lines is as follows: the average stress value of the points on all watershed lines on the force cloud map is MYL; the area where the average stress value of all points in the area formed by each watershed line is greater than MYL is marked as a stressed sub-area; or, the minimum value of the points on each watershed line is taken as the boundary stress minimum value; each area formed by each watershed line whose boundary stress minimum value is greater than MYL is recorded as a stressed sub-area.

3. The design method of a lifting and moving device according to claim 1, characterized in that: In S500, the method for calculating the weak stress area in each stressed sub-area is as follows: the point with the largest stress value in each stressed sub-area is recorded as the stressed point; the average stress value of each point in the stressed sub-area is recorded as the regional stress value; the stressed sub-area with the largest regional stress value in each stressed sub-area is recorded as the support point area; the stressed points in the support point area are recorded as the support points; the distance values ​​from the support points to the stressed points of each stressed sub-area are recorded as the component arm distances of each stressed sub-area; each stressed sub-area except the support point area is screened for mutual influence in turn to obtain the mutual influence area; and the weak stress area in each stressed sub-area is marked according to the mutual influence area.

4. The design method of a lifting and moving device according to claim 3 is characterized in that: The method for performing mutual influence screening to obtain the mutual influence region is as follows: the force sub-region to be screened for mutual influence is taken as the current force sub-region, and the force sub-region whose regional force value is less than the regional force value of the current force sub-region except the support point region, and whose force arm distance has the smallest non-zero difference with the force arm distance of the current force sub-region is taken as the current minimum force region; the force sub-region whose regional force value is less than the regional force value of the current force sub-region except the support point region, and whose force arm distance has the largest non-zero difference with the force arm distance of the current force sub-region is taken as the current maximum force region; The plane determined by the force points of the current minimum force area, the force points of the current maximum force area and the support points is the current force surface; the intersection line of the current force surface and the cutting plane of the three-dimensional force cloud map is the current intersection line; all force sub-areas containing the current intersection line are recorded as the mutual influence area of ​​the current force sub-areas.

5. The design method of a lifting and moving device according to claim 3, characterized in that: The method of marking the weak stress area in each stressed sub-area according to the mutual influence area is: judging whether the mutual influence area of ​​each stressed sub-area is nonlinear stress, and if so, marking the current stressed sub-area as the weak stress area.

6. The design method of a lifting and moving device according to claim 5, characterized in that: The specific method for judging whether the mutual influence area of ​​each force sub-area is nonlinear force is as follows: According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence from small to large and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list; The mutual influence region with the smallest absolute value of the difference between the regional force value of the current maximum force region and the regional force value of the current maximum force region in the influence list is recorded as the increasing force region of the i-th mutual influence region; the mutual influence region with the smallest absolute value of the difference between the regional force value of the current minimum force region and the regional force value of the current minimum force region in the influence list is recorded as the decreasing force region of the i-th mutual influence region; the absolute value of the difference between the regional force value of the increasing force region of the i-th mutual influence region and the regional force value of the decreasing force region of the i-th mutual influence region is taken as Diff(i); If when traversing i from 1 to N, there is a situation where Diff(i-1) is greater than Diff(i) and Diff(i) is less than Diff(i+1), then the mutual influence area of ​​the current force-bearing sub-area is nonlinear force, otherwise it is linear force.

7. The design method of a lifting and moving device according to claim 6, characterized in that: The method for determining whether the mutual influence area of ​​each force-bearing sub-area is nonlinearly stressed is replaced by: According to the size of the component arm distance corresponding to the mutual influence area, each mutual influence area is sequentially formed into a sequence from small to large and recorded as an influence list, i is a variable from 1 to N, and N is the number of mutual influence areas in the influence list; The sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force values ​​of the current maximum force region is recorded as the incremental sum; the sum of all differences between the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force values ​​of the current minimum force region is recorded as the decremental sum; When the sum of the increments is greater than the sum of the decrements, the absolute value of the difference between the maximum value of the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current maximum force region is taken as the cumulative force difference DiV(i); otherwise, the absolute value of the difference between the minimum value of the regional force values ​​corresponding to the 1st to the ith mutual influence regions in the influence list and the regional force value of the current minimum force region is taken as the cumulative force difference DiV(i); If when traversing i from 1 to N, there is a situation where DiV(i-1) is greater than DiV(i) and DiV(i) is less than DiV(i+1), then the mutual influence area of ​​the current force-bearing sub-area is nonlinear force, otherwise it is linear force.

8. A design system for a lifting and moving device, characterized in that: The design system of a lifting and moving device includes: a processor, a memory, and a computer program stored in the memory and running on the processor. When the processor executes the computer program, it implements the steps of the design method of a lifting and moving device described in any one of claims 1 to 7.

9. A lifting and moving device, wherein the lifting and moving device is designed according to an optimized design three-dimensional model of the lifting and moving device marked with an area to be strengthened obtained by a design method of a lifting and moving device according to any one of claims 1 to 7, and the lifting and moving device comprises a lifting bracket, a longitudinal frame, a transverse frame, a lifting assembly, and a sling.

10. The lifting and moving device according to claim 9, characterized in that: The lifting bracket includes a plurality of lifting bracket lattice columns and a column top frame, wherein the plurality of lifting bracket lattice columns are stacked vertically, and the column top frame is arranged on the upper part of the uppermost lifting bracket lattice column. The lifting bracket lattice column can include multiple specifications, and each specification has the same length and width dimensions but different heights. The lifting bracket can be adjusted by setting different lifting bracket lattice columns.

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